Consider this sequence:
```
jshell> var t = (com.sun.source.util.JavacTask) javax.tools.ToolProvider.getSystemJavaCompiler().getTask(null, null, null, null, null, List.of(javax.tools.SimpleJavaFileObject.forSource(URI.create("mem://Test.java"), "")))
t ==> com.sun.tools.javac.api.JavacTaskImpl@1a8a8f7c

jshell> t.getElements().getAllModuleElements()
| Exception java.lang.AssertionError
| at Assert.error (Assert.java:155)
| at Assert.checkNonNull (Assert.java:62)
| at Modules.allModules (Modules.java:1226)
| at JavacElements.getAllModuleElements (JavacElements.java:132)
| at (#2:1)

```

This feels wrong.

See:
https://github.com/openjdk/jdk/pull/18934/files#r1767657515